Kingsbury added that the team is working through some things with Hudson and that he could not go into further detail on the situation.
Hudson is subject to around $95,000 in fines for missing minicamp, although Arizona could choose not to fine him.
Hudson, 32, is a former second-round pick of the Chiefs back in 2011. He played out his four-year, $3,506,100 rookie contract in Kansas City before agreeing to a five-year, $44.5 million contract with the Raiders for the 2015 season.
Hudson was set to make a base salary of $8.25 million for the 2019 season before signing a three-year extension with the Raiders worth $33.75 million with $24.4 million guaranteed.
However, the Raiders traded him to the Cardinals prior to the 2021 season.
In 2021, Hudson appeared in and started 12 games for the Cardinals as their center.
Pro Football Focus rated Hudson as the No. 31 center out of 39 qualifying players.
We will have more news on Hudson as it becomes available.